Java Code Examples for org.rocksdb.Statistics

The following examples show how to use org.rocksdb.Statistics. These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source Project: hadoop-ozone   Source File: TestTypedRDBTableStore.java    License: Apache License 2.0 6 votes vote down vote up
@Before
public void setUp() throws Exception {
  options = new DBOptions();
  options.setCreateIfMissing(true);
  options.setCreateMissingColumnFamilies(true);

  Statistics statistics = new Statistics();
  statistics.setStatsLevel(StatsLevel.ALL);
  options = options.setStatistics(statistics);

  Set<TableConfig> configSet = new HashSet<>();
  for (String name : families) {
    TableConfig newConfig = new TableConfig(name, new ColumnFamilyOptions());
    configSet.add(newConfig);
  }
  rdbStore = new RDBStore(folder.newFolder(), options, configSet);

  codecRegistry = new CodecRegistry();

}
 
Example 2
Source Project: hadoop-ozone   Source File: TestRDBStore.java    License: Apache License 2.0 6 votes vote down vote up
@Before
public void setUp() throws Exception {
  options = new DBOptions();
  options.setCreateIfMissing(true);
  options.setCreateMissingColumnFamilies(true);

  Statistics statistics = new Statistics();
  statistics.setStatsLevel(StatsLevel.ALL);
  options = options.setStatistics(statistics);
  configSet = new HashSet<>();
  for(String name : families) {
    TableConfig newConfig = new TableConfig(name, new ColumnFamilyOptions());
    configSet.add(newConfig);
  }
  rdbStore = new RDBStore(folder.newFolder(), options, configSet);
}
 
Example 3
Source Project: hadoop-ozone   Source File: TestRDBTableStore.java    License: Apache License 2.0 6 votes vote down vote up
@Before
public void setUp() throws Exception {
  options = new DBOptions();
  options.setCreateIfMissing(true);
  options.setCreateMissingColumnFamilies(true);

  Statistics statistics = new Statistics();
  statistics.setStatsLevel(StatsLevel.ALL);
  options = options.setStatistics(statistics);

  Set<TableConfig> configSet = new HashSet<>();
  for(String name : families) {
    TableConfig newConfig = new TableConfig(name, new ColumnFamilyOptions());
    configSet.add(newConfig);
  }
  rdbStore = new RDBStore(folder.newFolder(), options, configSet);
}
 
Example 4
Source Project: besu   Source File: RocksDBStats.java    License: Apache License 2.0 6 votes vote down vote up
public static void registerRocksDBMetrics(
    final Statistics stats,
    final PrometheusMetricsSystem metricsSystem,
    final MetricCategory category) {
  for (final TickerType ticker : TICKERS) {
    final String promCounterName = ticker.name().toLowerCase();
    metricsSystem.createLongGauge(
        category,
        promCounterName,
        "RocksDB reported statistics for " + ticker.name(),
        () -> stats.getTickerCount(ticker));
  }

  for (final HistogramType histogram : HISTOGRAMS) {
    metricsSystem.addCollector(category, histogramToCollector(stats, histogram));
  }
}
 
Example 5
Source Project: besu   Source File: RocksDBStats.java    License: Apache License 2.0 6 votes vote down vote up
private static Collector histogramToCollector(
    final Statistics stats, final HistogramType histogram) {
  return new Collector() {
    final String metricName =
        KVSTORE_ROCKSDB_STATS.getName() + "_" + histogram.name().toLowerCase();

    @Override
    public List<MetricFamilySamples> collect() {
      final HistogramData data = stats.getHistogramData(histogram);
      return Collections.singletonList(
          new MetricFamilySamples(
              metricName,
              Type.SUMMARY,
              "RocksDB histogram for " + metricName,
              Arrays.asList(
                  new MetricFamilySamples.Sample(metricName, LABELS, LABEL_50, data.getMedian()),
                  new MetricFamilySamples.Sample(
                      metricName, LABELS, LABEL_95, data.getPercentile95()),
                  new MetricFamilySamples.Sample(
                      metricName, LABELS, LABEL_99, data.getPercentile99()))));
    }
  };
}
 
Example 6
Source Project: besu   Source File: RocksDBKeyValueStorage.java    License: Apache License 2.0 6 votes vote down vote up
public RocksDBKeyValueStorage(
    final RocksDBConfiguration configuration,
    final MetricsSystem metricsSystem,
    final RocksDBMetricsFactory rocksDBMetricsFactory) {

  try {
    final Statistics stats = new Statistics();
    options =
        new Options()
            .setCreateIfMissing(true)
            .setMaxOpenFiles(configuration.getMaxOpenFiles())
            .setTableFormatConfig(createBlockBasedTableConfig(configuration))
            .setMaxBackgroundCompactions(configuration.getMaxBackgroundCompactions())
            .setStatistics(stats);
    options.getEnv().setBackgroundThreads(configuration.getBackgroundThreadCount());

    txOptions = new TransactionDBOptions();
    db = TransactionDB.open(options, txOptions, configuration.getDatabaseDir().toString());
    rocksDBMetrics = rocksDBMetricsFactory.create(metricsSystem, configuration, db, stats);
  } catch (final RocksDBException e) {
    throw new StorageException(e);
  }
}
 
Example 7
Source Project: dremio-oss   Source File: ByteStoreManager.java    License: Apache License 2.0 6 votes vote down vote up
private void registerMetrics(DBOptions dbOptions) {
  // calling DBOptions.statisticsPtr() will create a Statistics object that will collect various stats from RocksDB and
  // will introduce a 5-10% overhead
  if(!COLLECT_METRICS) {
    return;
  }

  final Statistics statistics = new Statistics();
  statistics.setStatsLevel(StatsLevel.ALL);
  dbOptions.setStatistics(statistics);
  // for now, let's add all ticker stats as gauge metrics
  for (TickerType tickerType : TickerType.values()) {
    if (tickerType == TickerType.TICKER_ENUM_MAX) {
      continue;
    }

    Metrics.newGauge(Metrics.join(METRICS_PREFIX, tickerType.name()), () -> statistics.getTickerCount(tickerType));
  }
  // Note that Statistics also contains various histogram metrics, but those cannot be easily tracked through our metrics
}
 
Example 8
Source Project: hadoop-ozone   Source File: RocksDBStoreMBean.java    License: Apache License 2.0 5 votes vote down vote up
public RocksDBStoreMBean(Statistics statistics, String dbName) {
  this.contextName = ROCKSDB_CONTEXT_PREFIX + dbName;
  this.statistics = statistics;
  histogramAttributes.add("Average");
  histogramAttributes.add("Median");
  histogramAttributes.add("Percentile95");
  histogramAttributes.add("Percentile99");
  histogramAttributes.add("StandardDeviation");
}
 
Example 9
Source Project: hadoop-ozone   Source File: RocksDBStoreMBean.java    License: Apache License 2.0 5 votes vote down vote up
public static RocksDBStoreMBean create(Statistics statistics,
                                       String contextName) {

  RocksDBStoreMBean rocksDBStoreMBean = new RocksDBStoreMBean(
      statistics, contextName);
  MetricsSystem ms = DefaultMetricsSystem.instance();
  MetricsSource metricsSource = ms.getSource(rocksDBStoreMBean.contextName);
  if (metricsSource != null) {
    return (RocksDBStoreMBean)metricsSource;
  } else {
    return ms.register(rocksDBStoreMBean.contextName,
        "RocksDB Metrics",
        rocksDBStoreMBean);
  }
}
 
Example 10
Source Project: sofa-jraft   Source File: RocksStatistics.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * Get the count for a ticker.
 */
public static long getTickerCount(final RocksRawKVStore rocksRawKVStore, final TickerType tickerType) {
    final Statistics statistics = statistics(rocksRawKVStore);
    if (statistics == null) {
        return -1L;
    }
    return statistics.getTickerCount(tickerType);
}
 
Example 11
Source Project: sofa-jraft   Source File: RocksStatistics.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * Get the count for a ticker and reset the tickers count.
 */
public static long getAndResetTickerCount(final RocksRawKVStore rocksRawKVStore, final TickerType tickerType) {
    final Statistics statistics = statistics(rocksRawKVStore);
    if (statistics == null) {
        return -1L;
    }
    return statistics.getAndResetTickerCount(tickerType);
}
 
Example 12
Source Project: sofa-jraft   Source File: RocksStatistics.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * Gets the histogram data for a particular histogram.
 */
public static HistogramData getHistogramData(final RocksRawKVStore rocksRawKVStore,
                                             final HistogramType histogramType) {
    final Statistics statistics = statistics(rocksRawKVStore);
    if (statistics == null) {
        return null;
    }
    return statistics.getHistogramData(histogramType);
}
 
Example 13
Source Project: sofa-jraft   Source File: RocksStatistics.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * Gets a string representation of a particular histogram.
 */
public String getHistogramString(final RocksRawKVStore rocksRawKVStore, final HistogramType histogramType) {
    final Statistics statistics = statistics(rocksRawKVStore);
    if (statistics == null) {
        return "";
    }
    return statistics.getHistogramString(histogramType);
}
 
Example 14
Source Project: sofa-jraft   Source File: RocksStatistics.java    License: Apache License 2.0 5 votes vote down vote up
/**
 * String representation of the statistic.
 */
public static String getStatisticsString(final RocksRawKVStore rocksRawKVStore) {
    final Statistics statistics = statistics(rocksRawKVStore);
    if (statistics == null) {
        return "";
    }
    return statistics.toString();
}
 
Example 15
Source Project: teku   Source File: RocksDbStats.java    License: Apache License 2.0 5 votes vote down vote up
private Collector histogramToCollector(
    final MetricCategory metricCategory, final Statistics stats, final HistogramType histogram) {
  return new Collector() {
    final String metricName =
        metricCategory.getApplicationPrefix().orElse("")
            + metricCategory.getName()
            + "_"
            + histogram.name().toLowerCase();

    @Override
    public List<MetricFamilySamples> collect() {
      return ifOpen(
          () -> {
            final HistogramData data = stats.getHistogramData(histogram);
            return Collections.singletonList(
                new MetricFamilySamples(
                    metricName,
                    Type.SUMMARY,
                    "RocksDB histogram for " + metricName,
                    Arrays.asList(
                        new MetricFamilySamples.Sample(
                            metricName, LABELS, LABEL_50, data.getMedian()),
                        new MetricFamilySamples.Sample(
                            metricName, LABELS, LABEL_95, data.getPercentile95()),
                        new MetricFamilySamples.Sample(
                            metricName, LABELS, LABEL_99, data.getPercentile99()))));
          },
          Collections.emptyList());
    }
  };
}
 
Example 16
Source Project: teku   Source File: RocksDbInstanceFactory.java    License: Apache License 2.0 5 votes vote down vote up
private static DBOptions createDBOptions(
    final RocksDbConfiguration configuration, final Statistics stats) {
  return new DBOptions()
      .setCreateIfMissing(true)
      .setBytesPerSync(1048576L)
      .setWalBytesPerSync(1048576L)
      .setMaxBackgroundFlushes(2)
      .setDbWriteBufferSize(configuration.getWriteBufferCapacity())
      .setMaxOpenFiles(configuration.getMaxOpenFiles())
      .setMaxBackgroundCompactions(configuration.getMaxBackgroundCompactions())
      .setCreateMissingColumnFamilies(true)
      .setEnv(Env.getDefault().setBackgroundThreads(configuration.getBackgroundThreadCount()))
      .setStatistics(stats);
}
 
Example 17
Source Project: hadoop-ozone   Source File: DBStoreBuilder.java    License: Apache License 2.0 4 votes vote down vote up
private DBOptions getDbProfile() {
  if (rocksDBOption != null) {
    return rocksDBOption;
  }
  DBOptions option = null;
  if (StringUtil.isNotBlank(dbname)) {
    List<ColumnFamilyDescriptor> columnFamilyDescriptors = new LinkedList<>();

    for (TableConfig tc : tables) {
      columnFamilyDescriptors.add(tc.getDescriptor());
    }

    if (columnFamilyDescriptors.size() > 0) {
      try {
        option = DBConfigFromFile.readFromFile(dbname,
            columnFamilyDescriptors);
        if(option != null) {
          LOG.info("Using Configs from {}.ini file", dbname);
        }
      } catch (IOException ex) {
        LOG.info("Unable to read RocksDB config from {}", dbname, ex);
      }
    }
  }

  if (option == null) {
    LOG.debug("Using default options: {}", dbProfile);
    option = dbProfile.getDBOptions();
  }

  if (rocksDBConfiguration.isRocksdbLoggingEnabled()) {
    org.rocksdb.Logger logger = new org.rocksdb.Logger(option) {
      @Override
      protected void log(InfoLogLevel infoLogLevel, String s) {
        ROCKS_DB_LOGGER.info(s);
      }
    };
    InfoLogLevel level = InfoLogLevel.valueOf(rocksDBConfiguration
        .getRocksdbLogLevel() + "_LEVEL");
    logger.setInfoLogLevel(level);
    option.setLogger(logger);
  }

  if (!rocksDbStat.equals(OZONE_METADATA_STORE_ROCKSDB_STATISTICS_OFF)) {
    Statistics statistics = new Statistics();
    statistics.setStatsLevel(StatsLevel.valueOf(rocksDbStat));
    option = option.setStatistics(statistics);
  }
  return option;
}
 
Example 18
Source Project: hadoop-ozone   Source File: MetadataStoreBuilder.java    License: Apache License 2.0 4 votes vote down vote up
public MetadataStore build() throws IOException {
  if (dbFile == null) {
    throw new IllegalArgumentException("Failed to build metadata store, "
        + "dbFile is required but not found");
  }

  // Build db store based on configuration
  final ConfigurationSource conf = optionalConf.orElse(DEFAULT_CONF);

  if (dbType == null) {
    LOG.debug("dbType is null, using ");
    dbType = conf.getTrimmed(OzoneConfigKeys.OZONE_METADATA_STORE_IMPL,
            OzoneConfigKeys.OZONE_METADATA_STORE_IMPL_DEFAULT);
    LOG.debug("dbType is null, using dbType {} from ozone configuration",
        dbType);
  } else {
    LOG.debug("Using dbType {} for metastore", dbType);
  }
  if (OZONE_METADATA_STORE_IMPL_LEVELDB.equals(dbType)) {
    Options options = new Options();
    options.createIfMissing(createIfMissing);
    if (cacheSize > 0) {
      options.cacheSize(cacheSize);
    }
    return new LevelDBStore(dbFile, options);
  } else if (OZONE_METADATA_STORE_IMPL_ROCKSDB.equals(dbType)) {
    org.rocksdb.Options opts;
    // Used cached options if config object passed down is the same
    if (CACHED_OPTS.containsKey(conf)) {
      opts = CACHED_OPTS.get(conf);
    } else {
      opts = new org.rocksdb.Options();
      if (cacheSize > 0) {
        BlockBasedTableConfig tableConfig = new BlockBasedTableConfig();
        tableConfig.setBlockCacheSize(cacheSize);
        opts.setTableFormatConfig(tableConfig);
      }

      String rocksDbStat = conf.getTrimmed(
          OZONE_METADATA_STORE_ROCKSDB_STATISTICS,
          OZONE_METADATA_STORE_ROCKSDB_STATISTICS_DEFAULT);

      if (!rocksDbStat.equals(OZONE_METADATA_STORE_ROCKSDB_STATISTICS_OFF)) {
        Statistics statistics = new Statistics();
        statistics.setStatsLevel(StatsLevel.valueOf(rocksDbStat));
        opts = opts.setStatistics(statistics);
      }
    }
    opts.setCreateIfMissing(createIfMissing);
    CACHED_OPTS.put(conf, opts);
    return new RocksDBStore(dbFile, opts);
  }
  
  throw new IllegalArgumentException("Invalid argument for "
      + OzoneConfigKeys.OZONE_METADATA_STORE_IMPL
      + ". Expecting " + OZONE_METADATA_STORE_IMPL_LEVELDB
      + " or " + OZONE_METADATA_STORE_IMPL_ROCKSDB
      + ", but met " + dbType);
}
 
Example 19
Source Project: besu   Source File: RocksDBColumnarKeyValueStorage.java    License: Apache License 2.0 4 votes vote down vote up
public RocksDBColumnarKeyValueStorage(
    final RocksDBConfiguration configuration,
    final List<SegmentIdentifier> segments,
    final MetricsSystem metricsSystem,
    final RocksDBMetricsFactory rocksDBMetricsFactory)
    throws StorageException {

  try {
    final List<ColumnFamilyDescriptor> columnDescriptors =
        segments.stream()
            .map(segment -> new ColumnFamilyDescriptor(segment.getId()))
            .collect(Collectors.toList());
    columnDescriptors.add(
        new ColumnFamilyDescriptor(
            DEFAULT_COLUMN.getBytes(StandardCharsets.UTF_8),
            new ColumnFamilyOptions()
                .setTableFormatConfig(createBlockBasedTableConfig(configuration))));

    final Statistics stats = new Statistics();
    options =
        new DBOptions()
            .setCreateIfMissing(true)
            .setMaxOpenFiles(configuration.getMaxOpenFiles())
            .setMaxBackgroundCompactions(configuration.getMaxBackgroundCompactions())
            .setStatistics(stats)
            .setCreateMissingColumnFamilies(true)
            .setEnv(
                Env.getDefault().setBackgroundThreads(configuration.getBackgroundThreadCount()));

    txOptions = new TransactionDBOptions();
    final List<ColumnFamilyHandle> columnHandles = new ArrayList<>(columnDescriptors.size());
    db =
        TransactionDB.open(
            options,
            txOptions,
            configuration.getDatabaseDir().toString(),
            columnDescriptors,
            columnHandles);
    metrics = rocksDBMetricsFactory.create(metricsSystem, configuration, db, stats);
    final Map<Bytes, String> segmentsById =
        segments.stream()
            .collect(
                Collectors.toMap(
                    segment -> Bytes.wrap(segment.getId()), SegmentIdentifier::getName));

    final ImmutableMap.Builder<String, ColumnFamilyHandle> builder = ImmutableMap.builder();

    for (ColumnFamilyHandle columnHandle : columnHandles) {
      final String segmentName =
          requireNonNullElse(
              segmentsById.get(Bytes.wrap(columnHandle.getName())), DEFAULT_COLUMN);
      builder.put(segmentName, columnHandle);
    }
    columnHandlesByName = builder.build();
  } catch (final RocksDBException e) {
    throw new StorageException(e);
  }
}
 
Example 20
Source Project: sofa-jraft   Source File: RocksStatistics.java    License: Apache License 2.0 4 votes vote down vote up
private static Statistics statistics(final RocksRawKVStore rocksRawKVStore) {
    return statisticsGetter.get(rocksRawKVStore);
}
 
Example 21
Source Project: sofa-jraft   Source File: RocksRawKVStore.java    License: Apache License 2.0 4 votes vote down vote up
public void addStatisticsCollectorCallback(final StatisticsCollectorCallback callback) {
    final RocksStatisticsCollector collector = Requires.requireNonNull(this.statisticsCollector,
        "statisticsCollector");
    final Statistics statistics = Requires.requireNonNull(this.statistics, "statistics");
    collector.addStatsCollectorInput(new StatsCollectorInput(statistics, callback));
}
 
Example 22
Source Project: teku   Source File: RocksDbStats.java    License: Apache License 2.0 4 votes vote down vote up
public RocksDbStats(final MetricsSystem metricsSystem, final MetricCategory category) {
  this.stats = new Statistics();
  this.metricsSystem = metricsSystem;
  this.category = category;
}
 
Example 23
Source Project: teku   Source File: RocksDbStats.java    License: Apache License 2.0 4 votes vote down vote up
public Statistics getStats() {
  return stats;
}
 
Example 24
public void initDB(RocksDbSettings settings) {
    resetDbLock.writeLock().lock();
    try {
        if (isAlive()) {
            return;
        }

        Preconditions.checkNotNull(dataBaseName, "no name set to the dbStore");

        try (Options options = new Options()) {

            // most of these options are suggested by https://github.com/facebook/rocksdb/wiki/Set-Up-Options

            // general options
            if (settings.isEnableStatistics()) {
                options.setStatistics(new Statistics());
                options.setStatsDumpPeriodSec(60);
            }
            options.setCreateIfMissing(true);
            options.setIncreaseParallelism(1);
            options.setLevelCompactionDynamicLevelBytes(true);
            options.setMaxOpenFiles(settings.getMaxOpenFiles());

            // general options supported user config
            options.setNumLevels(settings.getLevelNumber());
            options.setMaxBytesForLevelMultiplier(settings.getMaxBytesForLevelMultiplier());
            options.setMaxBytesForLevelBase(settings.getMaxBytesForLevelBase());
            options.setMaxBackgroundCompactions(settings.getCompactThreads());
            options.setLevel0FileNumCompactionTrigger(settings.getLevel0FileNumCompactionTrigger());
            options.setTargetFileSizeMultiplier(settings.getTargetFileSizeMultiplier());
            options.setTargetFileSizeBase(settings.getTargetFileSizeBase());

            // table options
            final BlockBasedTableConfig tableCfg;
            options.setTableFormatConfig(tableCfg = new BlockBasedTableConfig());
            tableCfg.setBlockSize(settings.getBlockSize());
            tableCfg.setBlockCacheSize(32 * 1024 * 1024);
            tableCfg.setCacheIndexAndFilterBlocks(true);
            tableCfg.setPinL0FilterAndIndexBlocksInCache(true);
            tableCfg.setFilter(new BloomFilter(10, false));

            // read options
            readOpts = new ReadOptions();
            readOpts = readOpts.setPrefixSameAsStart(true)
                    .setVerifyChecksums(false);

            try {
                logger.debug("Opening database");
                final Path dbPath = getDbPath();
                if (!Files.isSymbolicLink(dbPath.getParent())) {
                    Files.createDirectories(dbPath.getParent());
                }

                try {
                    database = RocksDB.open(options, dbPath.toString());
                } catch (RocksDBException e) {
                    logger.error(e.getMessage(), e);
                    throw new RuntimeException("Failed to initialize database", e);
                }

                alive = true;

            } catch (IOException ioe) {
                logger.error(ioe.getMessage(), ioe);
                throw new RuntimeException("Failed to initialize database", ioe);
            }

            logger.debug("<~ RocksDbDataSource.initDB(): " + dataBaseName);
        }
    } finally {
        resetDbLock.writeLock().unlock();
    }
}
 
Example 25
@Override
public Options setStatistics(final Statistics statistics) {
    dbOptions.setStatistics(statistics);
    return this;
}
 
Example 26
@Override
public Statistics statistics() {
    return dbOptions.statistics();
}
 
Example 27
Source Project: hudi   Source File: RocksDBDAO.java    License: Apache License 2.0 4 votes vote down vote up
/**
 * Initialized Rocks DB instance.
 */
private void init() {
  try {
    LOG.info("DELETING RocksDB persisted at " + rocksDBBasePath);
    FileIOUtils.deleteDirectory(new File(rocksDBBasePath));

    managedHandlesMap = new ConcurrentHashMap<>();
    managedDescriptorMap = new ConcurrentHashMap<>();

    // If already present, loads the existing column-family handles

    final DBOptions dbOptions = new DBOptions().setCreateIfMissing(true).setCreateMissingColumnFamilies(true)
        .setWalDir(rocksDBBasePath).setStatsDumpPeriodSec(300).setStatistics(new Statistics());
    dbOptions.setLogger(new org.rocksdb.Logger(dbOptions) {
      @Override
      protected void log(InfoLogLevel infoLogLevel, String logMsg) {
        LOG.info("From Rocks DB : " + logMsg);
      }
    });
    final List<ColumnFamilyDescriptor> managedColumnFamilies = loadManagedColumnFamilies(dbOptions);
    final List<ColumnFamilyHandle> managedHandles = new ArrayList<>();
    FileIOUtils.mkdir(new File(rocksDBBasePath));
    rocksDB = RocksDB.open(dbOptions, rocksDBBasePath, managedColumnFamilies, managedHandles);

    ValidationUtils.checkArgument(managedHandles.size() == managedColumnFamilies.size(),
        "Unexpected number of handles are returned");
    for (int index = 0; index < managedHandles.size(); index++) {
      ColumnFamilyHandle handle = managedHandles.get(index);
      ColumnFamilyDescriptor descriptor = managedColumnFamilies.get(index);
      String familyNameFromHandle = new String(handle.getName());
      String familyNameFromDescriptor = new String(descriptor.getName());

      ValidationUtils.checkArgument(familyNameFromDescriptor.equals(familyNameFromHandle),
          "Family Handles not in order with descriptors");
      managedHandlesMap.put(familyNameFromHandle, handle);
      managedDescriptorMap.put(familyNameFromDescriptor, descriptor);
    }
  } catch (RocksDBException | IOException re) {
    LOG.error("Got exception opening Rocks DB instance ", re);
    throw new HoodieException(re);
  }
}